This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 36 |
| 3 | 98 |
| 4 | 271 |
| 5 | 834 |
| 6 | 2307 |
| 7 | 6115 |
| 8 | 16544 |
| 9 | 44250 |
| 10 | 116526 |
| 11 | 307117 |
| 12 | 808976 |
| 13 | 2122787 |
| 14 | 5564987 |
| 15 | 14588870 |
| 16 | 38216326 |
| 17 | 100064540 |
| 18 | 261992129 |
| 19 | 685862456 |
| 20 | 1795255303 |
| 21 | 4698927663 |
| 22 | 12298716264 |
| 23 | 32188880680 |
| 24 | 84245176534 |
| 25 | 220486127041 |